Index: src_plugins/rbs_routing/map.c
===================================================================
--- src_plugins/rbs_routing/map.c	(revision 38745)
+++ src_plugins/rbs_routing/map.c	(revision 38746)
@@ -169,6 +169,7 @@
 
 	a = grbs_arc_new(&rbs->grbs, pt, 0, 0, 0, 0);
 	gdl_append(&tn->arcs, a, link_2net);
+	a->user_data = obj;
 
 	bind_prev_line(rbs, prevarc, prevline, a);